Improved flour-sifter



Y PATENtmaD JUNE 1s, 1865. H. TILDEN. FLOUB, SIFTBB.

experiment. A

UNITED STATES PATENT OFFICE.

HOWARD TILDEN', oF nostros, MAssAcIaIUs'E'InIs.l

IMPROVE-o -FLoUR-sl FTER.

Specification forming part'of Letters Patent No. 48,228, dated June 13,1865.

To all whom it may concern: y

Be it known that I, HOWARD TILDEN, of Boston, Suffolk county, and Stateof Massachusetts, late of Philadelphia, in the State of Pennsylvania,have invented a new, useful, and Improved Sifter for Flour, Apple orPumpkin Sauce, &c. and I do hereby declare that the, followingdescription and accompanying drawings are suicient to enable any personskilled in the art or science to which it most nearly` appertains tomakeand use my said invention or improvements without further inventionor The nature of my invention and improvement in sit'ters for flour,sauce, &c., consists in the use of rollers to roll against the screen,in combination with Scrapers to pass over the screen after the rollers.

1 In the accompanying drawings, Figure l is a plan or top view ofmyimproved sifter.. Fig.

' 2 is a sectional elevation ot' the same, out perl'vendicularly acrossthe center.

'In these drawings, A A are the sides, and B Bthe'ends, o! the box orhopper, made of wood, tin, or other suitable material, in the formshown, or in'such other form as will answer the purpose. The lower edgesof the ends B B are made in the arc of a circle, as shownA in Fig. 2, togive form to the woven-wire screen C, which is fastened to` them and tothe lower edges of the sides A A.A I make some piecesy I) D in the formshown in Fig. 2, and fasten them to thefends B B to support the boi:Vand screen a vproper distance from the bottom of the tub or vessel whichis to receive the our or sauce l sifted. The ends B are perforated forthe journals of the shaft F to turn in, which shaft is provided with acrank, E, to turn it and operate the machine. The journal at the crankend of .the shaft F is made larger than the other part, and has ascrew-thread, G, cut on itto tit a female screw in the 'disk H, and athread, I,

for the disk J, the diameter of the shaft being less at I than at G, andstill smaller for the journal at the end opposite the crank, to allowthe femalescrew in the disk to pass over it freely when the shaft isremoved to takeout the disks and parts attached to clean them. The disksH and J are connected 4by the bars lK K, which are firmly fastened tothe disks andprovideduwith iiexible Scrapers-S, of india..

rubber, leather, or other material, which sweep the material to besifted over the screen C, through ,which it is sifted. Alternatelybctween the bars K, I arrange some rollers L L,

the ends of which rollers are fitted to turn freely4 in the disks as therollers roll over the our and the screen and mash thelumps and press theHour or material being sifted through the screen. 1

To use the improved sifter, place it on the board `or vessel which istoreceive the sifted,

